Alwys Cogpsin was the tinker supporting the company called the "Rolling Thunder" as they rode into battle against the Horde in siege wagons. When the archers complained about the jostling of the vehicles affecting the accuracy of their shots, Alwys Cogspin constructed a set of gears and counterweights that compensated for the shocks and jolts of firing while in motion. He had invented the bow stabilizer. When the "Rolling Thunder" was honored as one of the most effective units in the Second War against the Horde, the commander was quick to acknowledge how much of their success came from Cogspin's devices.